diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2019-06-04 23:09:32 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2019-06-12 14:49:47 +0300 |
| commit | d1707a96b11787c7b9ca11fd93d235d6eb6ccbf1 (patch) | |
| tree | 0ba0b48fdf54eebbd2432dcd04b11e10a94d38dd | |
| parent | 0f52c097a25fb09378968db7afed54d306e6bcff (diff) | |
drm/i915: Assert that HSW/BDW LCPLL is using the non-SSC reference
Only the non-SSC reference is truly supported for the LCPLL. Assert
that it is indeed selected.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190604200933.29417-4-ville.syrjala@linux.intel.com
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display_power.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display_power.c b/drivers/gpu/drm/i915/intel_display_power.c index 278a7edc94f5..bb9ef1cea5db 100644 --- a/drivers/gpu/drm/i915/intel_display_power.c +++ b/drivers/gpu/drm/i915/intel_display_power.c @@ -3665,6 +3665,9 @@ static void hsw_assert_cdclk(struct drm_i915_private *dev_priv) if (val & LCPLL_PLL_DISABLE) DRM_ERROR("LCPLL is disabled\n"); + + if ((val & LCPLL_REF_MASK) != LCPLL_REF_NON_SSC) + DRM_ERROR("LCPLL not using non-SSC reference\n"); } static void assert_can_disable_lcpll(struct drm_i915_private *dev_priv) |